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Title No Effect of Malocclusion on temporomandibular disorders
Clinical Question In a healthy patient, what factor does occlusion have in developing a temporomandibular disorder?
Clinical Bottom Line Malocclusion has no clear association as a factor in the development of temporomandibular disorders (See Comments on the CAT below)
Best Evidence (you may view more info by clicking on the PubMed ID link)
PubMed ID Author / Year Patient Group Study type
(level of evidence)
#1) 12160256Marzooq/1999275 Articles Literature Review
Key resultsAlthough occlusal relationships, such as overbite, non-working side interferences, and discrepancy between the intercuspal position and the retruded contact position, have often been considered as contributing factors of TMD, there is no consistency among even those studies that support such an occlusal factor.
#2) 15387030Bernhardt/20044310 patientsSystematic Review
Key resultsOcclusal factors examined in this study explained only a small part of the differences between normal subjects and those with TMD signs. Single occlusal factors that showed significant effects throughout several studies could not be detected.
Evidence Search PubMed: "Malocclusion"[Mesh] AND " Temporomandibular Joint Disorders "[Mesh]
Comments on
The Evidence
The Marzooq article is a 1999 literature review of 275 articles selected from a prosthetic point of view. It is misclassified by PubMed as a meta-analysis. However, the conclusions are consistent with the more recent large population based study of 4310 adults, which found no clear association between occlusion and TMD.
Applicability Patients with temporomandibular disorders
Specialty/Discipline (General Dentistry)
Keywords Malocclusion, Occlusion, Temporomandibular Joint, Temporomandibular Joint Disorder
ID# 551
Date of submission: 04/08/2010spacer Revised: 04/03/2012
E-mail Hoedebecke@livemail.uthscsa.edu
Author Blake Hoedebecke
Co-author(s) e-mail
Faculty mentor/Co-author Edward F. Wright, DDS, MS
Faculty mentor/Co-author e-mail WrightE2@uthscsa.edu
Basic Science Rationale
(Mechanisms that may account for and/or explain the clinical question, i.e. is the answer to the clinical question consistent with basic biological, physical and/or behavioral science principles, laws and research?)
post a rationale
None available
Comments and Evidence-Based Updates on the CAT
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by Shih-Jye Yei, Mike Salas, Hien Nguyen (San Antonio, Texas) on 01/07/2013
The CAT discusses occlusion factor in developing a temporomandibular disorder. The results showed there was no clear association between malocclusion and temporomandibular disorder. An article discussed occlusion factors associated with temporomandibular disorder was found. The results showed that there was also no clear association between malocclusion and temporomandibular disorder. The article was published in 2012 PMID#: 22486535

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